JP3326146B2 - Elastic doll head, molding method thereof, and molding die - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic doll head formed by blow molding, a method of molding the same, and a molding die.

[0002]

2. Description of the Related Art Conventionally, an elastic doll head made of vinyl chloride has been formed by rotation molding, but recently, instead of vinyl chloride, a safer thermoplastic elastomer such as olefin or urethane is used. Is considered. However, since thermoplastic elastomers are not suitable for rotation molding, attempts have been made to mold them by blow molding.

[0003]

However, in blow molding, a hole into which air is blown remains in a molded product.
Since air is blown from the top during molding, it was unavoidable that a hole was formed in the top of the molded product. However, since the head is then planted, if the above-mentioned hole or its surroundings are planted at the time of planting, it becomes easier for the plant to come off, and the hair of the doll can easily come off when it is combed. There was a problem that it would.

Further, blow molding has a disadvantage that a parting line remains in a molded product. This disadvantage can be solved by forming the connection between the upper part of the forehead, the back side of both ears and the back of the neck, that is, in such a manner as to remain in a less conspicuous part. However, in this case, a molding space for a face portion having complex irregularities such as eyes, nose, and ears is formed in one mold, and a smooth occipital molding space having less irregularities is formed in the other mold. . Therefore, the can and the mold is opened after molding, the molded product is desirably from falling off the molds, the molded product is likely to cause remains in the mold with the face portion. After the mold is opened, the molded product hardens rapidly, so if you do not carefully pull out the molded product with careful attention to the direction of force and force, the face may be scratched and the product value may be impaired there were.

The present invention solves the above problems, and does not leave a parting line or a hole of an air inlet at the time of molding on the head, which can be said to be the life of the doll, and accurately, does not leave it on the part that is to be viewed. In addition, a head for an elastic doll, which can perform a flocking process without any problem, and which can reliably remove a molded product from both molds when the mold is opened, a molding method for the same, and a molding die provided for this molding method. The task is to provide.

[0006]

In order to solve the above-mentioned problems, a method for forming an elastic doll head according to the present invention has the following features. (B) Forming a molding space in two molds for the head so as to form a parting line connecting the upper part of the head, the backs of both ears, and the back of the neck. The neck hole forming means is formed so as to be able to protrude and retract in the mold of (c). The neck hole forming means is provided between the two molds.
Blow molding by forming an air injection nozzle that injects air into a cylindrical parison arranged at

The hole formed by the air injection nozzle is an engagement hole for engaging the doll body.

[0008] The molding material for the blow molding is preferably a thermoplastic elastomer.

Further, it is preferable to perform pre-blow at the time of the blow molding.

[0010] Further, a fixing pin is disposed between the two dies, and a molding space for forming a surplus portion is formed at a portion corresponding to the fixing pin of the dies, and the molding space is formed at the time of molding. It is desirable to embed the above-mentioned fixing pin in the surplus part which has gone around.

Next, a molding die for an elastic doll head is characterized by the following requirements. (A) The molding space is formed of two molds, and a molding space is formed so as to form a parting line connecting the upper part of the head of the elastic doll, the back of both ears, and the back of the neck. b) the portion corresponding to the neck of the neck side of the mold through hole is formed, through the through hole Kubiana portion forming means is slidably fitted, above the tip of Kubiana portion forming means Two molds
An air injection nozzle for injecting air into the cylindrical parison arranged between the molds is arranged

In addition, a pre-pinch material for pre-blow is attached to each of the molds, and is urged by a spring so as to protrude from the mating surface. It is preferable that a molding space is formed in the parting line to form a continuous excess portion via a thin portion.

It is preferable that a fixing pin is arranged between the two dies, and that a molding space for a surplus portion is formed in a portion corresponding to the fixing pin in each of the dies.

[0014]

1 (a), 1 (b) and 1 (c) show an elastic doll head according to the present invention. The head A is made of an olefin-based thermoplastic elastomer, as will be described later. Parting line 1 formed by blow molding
Is formed so as to connect the forehead 2, the back 3 of both ears and the back of the neck 4. A hole p is formed through only the neck hole 5, and there is no hole in the head including the crown.

Therefore, according to the head A, since the head is made of an olefin-based thermoplastic elastomer, there is no problem in safety even if the infant licks the doll. There is no risk of generating harmful substances and it is safe. Furthermore, since the parting line 1 is hidden by the hair when performing the flocking process after molding and does not appear outside, the parting line 1
Even if it is not removed later, the commercial value will not be impaired, and can be used as a guideline for the subsequent flocking process. Moreover, since there is no hole in the head including the top of the head, the flocking treatment after molding can be performed without any problem.

The molding material is preferably an olefin-based thermoplastic elastomer, but may be a urethane-based elastomer.

Next, the head A may be blow-molded as follows. That is, as shown in FIG. 2, the molding die is composed of two dies 6 and 7, and the forehead 2 of the head A for elastic doll, the back 3 of both ears, and the back of the neck 4 are formed. Forming spaces 8, 9 so that a parting line 1 to be connected is formed.
Are formed.

A through-hole 10 is formed in a portion of one of the molds 6 corresponding to the neck hole 5, and a neck hole forming means 11 is slidably fitted into the through hole 10, and the neck hole is formed. Forming means 11
An air injection nozzle 12 is disposed at the end of the nozzle. The air injection nozzle 12 is connected to an external air supply source (not shown) through the neck hole forming means 11 and slides the neck hole forming means 11 into the molding space 8 of the mold 6. It is provided to appear and disappear.

In the molding spaces 8 and 9 of the mold, small holes for discharging air between the molding material and the molding space at the time of molding are formed in ears, nose, mouth and the like so that air can escape. Alternatively, a molding die having a large number of pores may be used.

In molding the head A for a doll, a parison 13a made of a thermoplastic elastomer as a molding material is dropped between open dies 6 and 7 as shown in FIG. 3, and as shown in FIG. The molds 6 and 7 are closed, and the neck hole forming means 11 is slid forward to form a molding space for molding the neck hole 5, and the air injection nozzle 12 is advanced into the molding space. Specifically, the tip of the air injection nozzle 12 penetrates through the parison 13a and enters the inside thereof. Then, air is injected by the air injection nozzle 12. The molding material 13 expands and sticks to the inner walls of the molding spaces 8 and 9 of the mold. Then, after the molding material 13 has cooled, the molds 8 and 9 are separated and opened, and the molded article (head) A inside may be taken out. Immediately before the dies 8, 9 are opened, the neck hole forming means 11 is retracted, and the air injection nozzle 12 is retracted from the formed neck hole 5. At this time, a neck hole p is formed.

The neck hole 5 formed by the neck hole forming means 11 has a diameter of about 10 as shown by the reference numeral in FIG.
The injection nozzle 12 is set to be at the center of the neck hole 5 during molding. Here, as described above, if the injection nozzle 12 is displaced from the center or the angle described later is too acute or obtuse, the hole p (see FIG. 1).
Is off-center or deformed. Of course, the hole p can be post-processed, but is not integrally formed. The nozzle diameter may be set to about 2 mm, but is not limited to this. Also, the better the injection nozzle 12 is at a right angle to the parison. In the normal case, the angle of the injection nozzle 12 is, as shown in FIG. 2, an angle α with respect to the wall surface of the through hole 10 of 15 ° to 25 ° (preferably 20 °).
The angle β with respect to the horizontal is 40 ° to 50 ° (preferably 45 °
°) is preferred.

According to the above blow molding, the head A shown in FIG. 1 is molded. The parting line 1 is formed so as to connect the upper forehead 2, the back sides 3 of both ears, and the back of the neck 4. Then, a hole p is formed in the molded head A when the air injection nozzle 12 is pulled out only in the neck hole 5, but no hole is formed in the head including the top of the head. The hole p is an engagement hole that engages with the neck provided on the upper part of the doll body, but the size of the hole may be adjusted by post-forming by drilling or the like.

In the above blow molding, the molding temperature of the olefin-based thermoplastic elastomer is set to 130 ° C. to obtain a doll head of approximately 40 × 30 mm.
170 ° C, air injection pressure 4-5kg / cm2,
Further, the diameter of the die for extruding the molding material into the molding space is 14 mm to 15 mm, and the diameter of the nozzle arranged at the center of the die is 9 mm, and thus the diameter of the parison is 14 mm to 15 mm.
The thickness was 15 mm and the thickness was 2.5 mm to 3 mm.

It is preferable to perform pre-blow at the time of the blow molding. To this end, as shown in FIGS. 5 (a) and 5 (b), a concave groove 14 is formed in the lower part of the molding space of each of the dies 6 and 7 in the left-right direction. The pre-pinch material 15 is attached. Springs 16 are arranged on the left and right sides of the concave groove 14, respectively, and urge the pre-pinch material 15 to protrude from the mating surface.

The pre-pinch material 1 of each of the dies 6 and 7
The parting line 1 is between the space 5 and the head molding space.
Forming spaces 17 and 18 for forming a continuous excess portion through a thin portion are formed.

According to the above configuration, when the dies 6 and 7 are closed during molding, as shown in FIG.
The molding material is also supplied to the insides 7 and 18 to form the surplus portion 19. Then, the pre-pinch members 15 of both molds come into contact with each other from opposite sides of the molding material 13 and are pressed against the spring force of the spring 16. When the molds 6 and 7 are opened after molding, the mating surfaces of the two molds are immediately separated as shown in FIG. 7, but the pre-pinch materials 15 are pressed against each other until the pressing force by the spring 16 disappears. Is held in a state before the molds 6 and 7 are opened. Therefore, the head A molded in the molding space also has
Although the mold opens and moves, the mold is kept in the closed state by the excess portion. Therefore, since the molded product A in the mold is pulled out from the dies 6 and 7 by the surplus portion 19, the molded product A can be removed from both dies when the dies are opened, and the molded product A can be removed from one of the dies. It is possible to effectively prevent the problem of being left inside. Since the excess portion 19 is continuous through the thin portion of the parting line, it can be easily removed from the molded product A by pulling after molding.

As another means for removing the molded product A from both the dies when the dies are opened, a fixing pin is provided between the two dies 6 and 7 as shown in FIG. 20 are arranged, and molding spaces 21 and 22 for excess portions are formed in portions corresponding to the fixing pins 20 in the same manner as described above.
Then, as shown in FIG. 9, when the molds 6 and 7 are closed during molding,
The molding material also enters the molding spaces 21 and 22 to form the surplus portion 23, and the fixing pin 20 is embedded in the surplus portion 23. In this state, when the dies 6 and 7 are opened as shown in FIG. 10, the fixed pin 20 is located between the dies 6 and 7 and does not move, so that the molded product A connected to the excess portion 23 is also held at the intermediate position. Is done. Therefore, since the molded product A in the dies 6 and 7 is pulled out from the dies, the molded product A can be reliably removed from the two dies when the dies are opened, and the molded product A is removed from the dies. Problem can be effectively prevented. Since the excess portion 23 is continuous via the thin portion of the parting line, it can be easily removed from the molded product A by pulling after molding.

In the usual case, the fixing pin 20 may use an air blowing pipe provided at the center of a normal molding material extrusion die.

As described above, the molded product can be pulled out of the mold by the pre-blow and the fixing pin. However, if the molded product is sufficiently separated by only one means, it is not necessary to use the other means together. . However, if only one means is not sufficient, both means may be used together.

[0030]

According to the first aspect of the present invention, since the air is injected by the air injection nozzle of the neck hole forming means provided in one of the dies and blow-molded, it includes the top portion. No holes are formed in the head. The parting line is also formed so as to connect the upper part of the forehead of the head, the back of both ears, and the back of the neck. In addition, since the air injection nozzle can freely move in and out of the molding space, it does not become an obstacle after molding.

According to the second aspect of the present invention, since the engaging hole for engaging with the doll body is integrally formed, the work process can be omitted, and the production efficiency is improved.

According to the third aspect of the present invention, since the head made of the thermoplastic elastomer can be molded, there is no problem in safety even when the infant licks the doll, and the doll becomes old and is disposed of or disposed of by incineration. It is safe because there is no risk of harmful substances.

According to the fourth aspect of the present invention, since the pre-blow is performed at the time of the blow molding, when the mold is opened after the molding, the molded product is more reliably removed from the mold and does not remain in one of the molds. .

According to the fifth aspect of the present invention, when molding,
Since the fixing pins between the individual molds are embedded in the excess portion, when the mold is opened, the molded product is pulled out of the mold by the secured extra portion, so that the molded product is more reliably molded. It does not come off the mold and remains in one mold.

According to the sixth aspect of the present invention, it is possible to form an elastic doll head having no hole in the head while the appearance is not impaired by the parting line.

According to the seventh and eighth aspects of the present invention, the effects of the seventh aspect of the present invention are obtained, and the molded product is more reliably separated from the mold after the molding by performing the polyblowing. be able to.

[Brief description of the drawings]

FIGS. 1 (a), 1 (b) and 1 (c) are a front view, a side view and a bottom view, respectively, showing a part of a head for an elastic doll according to the present invention.

FIG. 2 is a sectional view of a mold for molding the head.

FIG. 3 is a sectional view showing a state where the mold is opened.

FIG. 4 is a sectional view showing a state in which the mold is closed.

FIGS. 5 (a) and 5 (b) are cross-sectional views of main parts of a side surface and a plane of another example of a mold, respectively

FIG. 6 is a sectional view showing a state in which the mold is closed.

FIG. 7 is a sectional view showing a state where the mold is opened.

FIG. 8 is a sectional view of another example of a mold.

FIG. 9 is a sectional view showing a state in which the mold is closed.

FIG. 10 is a sectional view showing a state where the mold is opened.

[Explanation of symbols]

 A Doll head 1 Parting line 12 Air injection nozzle

──────────────────────────────────────────────────続 き Continuation of front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A63H 1/00-37/00 B29C 49/70

Claims (8)

(57) [Claims] 1. A method for forming a head for an elastic doll, comprising the following requirements. (B) Forming a molding space in two molds for the head so as to form a parting line connecting the upper part of the head, the backs of both ears, and the back of the neck. The neck hole forming means is formed so as to be able to protrude and retract in the mold of (c). The neck hole forming means is provided between the two molds.
Blow molding by forming an air injection nozzle that injects air into a cylindrical parison arranged at 2. The hole formed by the air injection nozzle is an engagement hole for engaging a doll body.
2. The method for forming an elastic doll head according to claim 1 . 3. A molding material of the blow-molding is a thermoplastic elastomer, the molding method of the elastic doll head of claim 1, wherein. Wherein performing pre-blow at the time of the blow molding, a molding method of the elastic doll head of claim 1, wherein. 5. A fixing pin is arranged between the two molds, and a molding space for forming a surplus portion is formed at a portion corresponding to the fixing pin of the mold, and the molding space is formed in the molding space at the time of molding. The fixing pin is buried in a surplus part that has wrapped around.
3. The method for forming an elastic doll head according to 2 . 6. A mold for forming a head for an elastic doll, which has the following requirements. (A) The molding space is formed of two molds, and a molding space is formed so as to form a parting line connecting the upper part of the head of the elastic doll, the back of both ears, and the back of the neck. b) the portion corresponding to the neck of the neck side of the mold through hole is formed, through the through hole Kubiana portion forming means is slidably fitted, above the tip of Kubiana portion forming means Two molds
An air injection nozzle for injecting air into the cylindrical parison arranged between the molds is arranged 7. A pre-pinch material for pre-blow is attached to each of the molds, and is urged by a spring so as to protrude from a mating surface. 7. A molding die for an elastic doll head according to claim 6 , wherein a molding space for forming a continuous excess portion via a thin portion is formed in the parting line. With previously arranged stationary pin between wherein said two molds, thereby forming a molding space for the excess thickness portion at portions corresponding to the fixing pin in each die, according to claim 6, wherein Molding head for elastic doll.